Updated Node

This commit is contained in:
Syrus Akbary 2016-06-14 21:45:44 -07:00
parent 6c7cf55b18
commit 8d4cf2d059
3 changed files with 22 additions and 9 deletions

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@ -3,25 +3,26 @@ import six
from graphql_relay import node_definitions, from_global_id, to_global_id
from ..types.field import Field
from ..types.options import Options
from ..types.objecttype import ObjectTypeMeta
from ..types.interface import Interface
class NodeMeta(ObjectTypeMeta):
def construct(cls, bases, attrs):
def __new__(cls, name, bases, attrs):
cls = super(NodeMeta, cls).__new__(cls, name, bases, attrs)
is_object_type = cls.is_object_type()
cls = super(NodeMeta, cls).construct(bases, attrs)
if not is_object_type:
get_node_from_global_id = getattr(cls, 'get_node_from_global_id', None)
id_resolver = getattr(cls, 'id_resolver', None)
assert get_node_from_global_id, '{}.get_node method is required by the Node interface.'.format(cls.__name__)
cls.id_resolver = attrs.pop('id_resolver', None)
node_interface, node_field = node_definitions(
get_node_from_global_id,
id_resolver=cls.id_resolver,
id_resolver=id_resolver,
)
cls._meta.graphql_type = node_interface
cls.Field = partial(Field.copy_and_extend, node_field, type=node_field.type, _creation_counter=None)
cls._meta = Options(None, graphql_type=node_interface)
cls.Field = partial(Field.copy_and_extend, node_field, type=node_field.type, parent=cls, _creation_counter=None)
else:
# The interface provided by node_definitions is not an instance
# of GrapheneInterfaceType, so it will have no graphql_type,
@ -38,11 +39,15 @@ class Node(six.with_metaclass(NodeMeta, Interface)):
@classmethod
def from_global_id(cls, global_id):
if cls is Node:
return from_global_id(global_id)
raise NotImplementedError("You need to implement {}.from_global_id".format(cls.__name__))
@classmethod
def to_global_id(cls, type, id):
if cls is Node:
return to_global_id(type, id)
raise NotImplementedError("You need to implement {}.to_global_id".format(cls.__name__))
@classmethod
def id_resolver(cls, root, args, context, info):

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@ -6,6 +6,10 @@ from ...types.scalars import String, Int
class CustomNode(Node):
@staticmethod
def to_global_id(type, id):
return id
@staticmethod
def get_node_from_global_id(id, context, info):
assert info.schema == schema

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@ -35,6 +35,10 @@ def get_fields(in_type, attrs, bases, graphql_types=()):
extended_fields = list(get_fields_from_types(graphene_bases))
local_fields = list(get_fields_from_attrs(in_type, attrs))
# We asume the extended fields are already sorted, so we only
# have to sort the local fields, that are get from attrs
# and could be unordered as is a dict and not OrderedDict
local_fields = sorted(local_fields, key=lambda kv: kv[1])
field_names = set(f[0] for f in local_fields)
for name, extended_field in extended_fields:
@ -45,4 +49,4 @@ def get_fields(in_type, attrs, bases, graphql_types=()):
fields.extend(local_fields)
return OrderedDict(sorted(fields, key=lambda kv: kv[1]))
return OrderedDict(fields)